Question: What city became a twin city of Klagenfurt in 1990?
Paraphrase: In 1990, what city became a twin city of Klagenfurt?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q41753 p:P190 ?s . ?s ps:P190 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'1990')) }